Spatial
refers to distance or space
Temporal
refers to ALL TIME, transmit (pulse duration) and receive
Peak
the maximum value
Pulsed
refers only to the transmit time
Pulsed is the average intensity for the pulse duration only (ignore listening time)
SATA
spatial average, temporal average (attenuation: weakening of sound beam)
All intensities have units of
W/cm^2
A number called the beam uniformity coefficient
also known as SP/SA Factor
(describes the spread of a beam in space, unit-less, with a value of 1 or greater)
What are the different measurements of intensities important to?
the study of bioeffects
What is the most relevant intensity with the respect to tissue heating?
SPTA
What intensity has the highest value?
SPTP
What intensity has the lowest value?
SATA
What is the duty factor in relation to intensity?
it describes the relationship of beam intensities with time
